Connection Diagram

1

2

3

V(in)

V(in)

GND

1

2

3

4

NC

Input Connector CN1

Hirose DF13-8P-1.25H

Corresponding Housing:

Hirose DF13-8S-1.25C

Corresponding Housing:

JST BHR-04VS-1

Output Connector CN2, CN3

JST SM04 (4.0) B-BHS

CN2

CN3

4

5

6

GND

On/Off

Bright DC

Bright Duty

7

8

S-GNG

12 Vdc

0/5 Vcc

0/5 Vdc

CCFT

1

2

3

4

NC

CCFT

LS680-1

PWM

DC Bright Control Method

Maximum output current can be adjusted by applying bias

voltage between brightness control pins as shown below.

Alternatively, brightness control can be done by applying

PWM signal to pin 5 (pin 4 must be tied to GND).

7

Brightness

Control DC Bias

(2-3.8 Vdc)

3

2

V(in)

1

V(in)

4

5

On/Off

6

Bright DC

Bright Duty

S-GND

8

GND

GND

16.00

14.00

12.00

10.00

8.00

6.00

4.00

2.00

0.00

1.8

2

2.2

2.4

2.6

2.8

3

3.2

3.4

3.6

3.8

4.0

DC Bias (Vdc)

DC

Lamp

Bias

Current

(2 lamps)

2.0 V

7.51 mA

2.2 V

8.45 mA

2.4 V

9.28 mA

2.6 V

10.05 mA

2.8 V

11.05 mA

3.0 V

11.58 mA

3.2 V

12.30 mA

3.4 V

13.18 mA

3.6 V

14.16 mA

3.8 V

14.21 mA

4.0 V

14.21 mA

The inverter is ON if one of the following conditions are met:

• Pin 3 (On/Off) = 2 Vdc —Vcc

The inverter is OFF if one of the following conditions are met:

• Pin 3 (On/Off) is connected to pin 7/8 (GND)

• Pin 3 (On/Off)

≤ 0.8 Vdc

On/Off Control

LS680-1

Model

Tech Notes

© Copyright 2000 Taiyo Yuden (U.S.A.), Inc. Specifications subject to change without notice.

FM 32227

PQAA REF.1612

Taiyo Yuden (U.S.A.), Inc.

1770 La Costa Meadows Drive, San Marcos, CA 92069

(760) 510-3200 / Fax: (760) 471-4021

(800) 493-6835

www.t-yuden.com

powerproducts@t-yuden.com

world leaders in materials and electronics technology

* Above specifications occur @ 25 ± 5ºC, with pin 5 connected to GND,